▎ 摘　　要

NOVELTY - Anti-collapse drilling fluid comprises base oils, organic soils, emulsifiers, plugging and anti-slump agents, fluid loss control agents, inhibitors, pH regulators, weighting agents and flow regulators. The plugging and anti-slump agent comprises inorganic rigid particles and nano-graphene. The average particle diameter of the inorganic rigid particles is 0.6-50 μm, and the average particle diameter of the nano-graphene is 30-300 nm. USE - The drilling fluid is useful in oil and gas drilling (claimed). ADVANTAGE - The drilling fluid: can seal the pore throats and gaps of various sizes in the formation; and is conducive to the formation of dense and tough mud cakes to prevent the drilling fluid from further intruding into the formation, so as to achieve the purpose of stabilizing the well wall; and prevents collapse.